A method is provided for transferring a mask pattern on a mask onto each of a plurality of shot areas on a substrate by synchronously moving the mask and the substrate with respect to an exposing radiation flux. An execution engine accesses a commingled data-centric application model that includes a data model for a data store and a business logic model for interacting with data entities contained in the data store. First and second end piece connectors are connected by rotating each end piece connector a minimal amount relative to each other, such that the rotation simultaneously locks end piece connectors together and engages mating tapers thus sealing the two end piece connectors and creating a leak proof seal. The housing and containers are suspended from the bracket. The first cross member further includes a pair of angled mating surfaces that are at an angle relative to the first cross member.